Journal ArticleDOI
The distribution of an intertidal aphid, Pemphigus trehernei foster, on marine saltmarshes.
William A. Foster,J. E. Treherne +1 more
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It is suggested that aphid distribution is primarily limited by soil conditions, especially the extent of soil drainage.Abstract:
The intertidal aphid, Pemphigus trehernei, is restricted to aster plants (Aster tripolium) growing near the edges of creeks and salt pans in low areas on tidal saltmarshes Aphid populations in mid-marsh areas do not show an equivalent edge effect In low-marshes the edge soil generally has more surface cracks and cavities which can accommodate aphids and a higher % air space than soil from regions away from edges Adults and 1st instars can penetrate edge soil more readily than non-edge soil Aphid abundance is positively correlated with % air space in low-marsh regions Aphid populations established on potted asters were destroyed or reduced to very low levels when transferred to non-edge regions of low-marsh areas It is suggested that aphid distribution is primarily limited by soil conditions, especially the extent of soil drainageread more
Citations
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Journal ArticleDOI
Foraging Strategies of Insects
TL;DR: This work looks upon patches as spatial subunits of the foraging area in which aggregations of food items occur, and identifies an aggregation ofFood items-a "patch"-as the next level in the hierarchy.
Book ChapterDOI
Insect herbivory below ground.
Valerie K. Brown,Alan C. Gange +1 more
TL;DR: This chapter discusses insect herbivory below ground, which can influence the full complement of parameters affected by the feeding activities of herbivores above ground.
Journal ArticleDOI
How a subsocial intertidal beetle, Bledius spectabilis, prevents flooding and anoxia in its burrow
TL;DR: Maternal care, in particular the combination of behaviours which protect the brood from the tide and anoxia, enables this airbreathing insect to colonise the inhospitable habitat of the intertidal saltmarsh.
Journal ArticleDOI
Synchronization of activity rhythms with the tide in a saltmarsh collembolan Anurida maritima.
William A. Foster,R. B. Moreton +1 more
TL;DR: It is suggested that the function of this tidal rhythm is to enable individual Anurida to anticipate the return of the tide both during periods of regular, twice-daily tidal submergence and after a period of days when the habitat has not been covered by the tide.
Journal ArticleDOI
The life history and population biology of an intertidal aphid, Pemphigus trehernei Foster
TL;DR: Temperature, host-plant growth and fungal attack are probably the most important factors affecting seasonal population fluctuations in Pemphigus trehernei.
References
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Journal ArticleDOI
Biological flora of the British Isles
TL;DR: A low\ glabrous\ evergreen shrub\ "4#Ð09Ð14Ð"39# cm tall[ the ~owering stems are decumbent to erect\ spar! ingly branched\ arising from a creeping\ woody rhi! zome].
Book
Flora of the British Isles
TL;DR: The classification of families and abbreviations of Pteridophyta, Gymnospermae, Angiospermaes, Dicotyledones, Monocotylingones and other life forms are summarized in this monograph.
Book
Grasses : a guide to their structure, identification, uses, and distribution in the British Isles
Journal ArticleDOI
The effect of plant spacing on the numbers of aphids trapped over the groundnut crop
TL;DR: The control of rosette disease of groundnuts by early planting and close spacing appears to be due to the inhibition of the landing response in A. craccivora by the continuous ground cover resulting from these treatments.
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